Commission rebate

[Ted J.]

I bought a rental property in 2015. Since I did all the research and brought the deal to my agent, she gave me a rebate and reported as Non-employee compensation in 1099. 

Should I report this income in Schedule C or E? I have a W-2 job and have always used schedule E for my rental income. This looks passive income as well so should be Schedule E. But if Schedule E is rental income only, then this is not.

Need some advice here.